Patent US4269893A successfully refreshed from Google Patents.
US4269893A
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Recording material containing a novel color developer
Assignee: Fujifilm Holdings Corp
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Filing: 1979-05-10
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Granted: 1981-05-26
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Expires: 1999-05-10
Abstract
Abstract A recording material in which a particular salicylic acid derivative is employed as a color developer, which derivative is a reaction product of a styrene dimer, an alkylstyrene dimer or the halogen substituted products thereof which material exhibits improved water resistivity, keeping stability and workability, does not produce color contamination when dipped in water and can exhibit its color-developing ability without special treatment.
Inventors
- 👤 Hajime Kato
- 👤 Masato Satomura
- 👤 Kozo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:51
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/333; B41M5/3333; B41M5/3335; B41M5/124; B41M5/132; B41M5/155; C; C07; C07C; C07C65/00; C07C65/01; C07C65/105; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
In a recording material in which images are formed by the reaction of a substantially colorless color former with a color developer, the improvement which comprises said color developer comprising the reaction product of salicyclic acid and a styrene dimer or a metal salt thereof, wherein said reaction product is represented by the following general formula: ##STR6## wherein R 1 to R 6 each represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R 5 and R 6 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms or halogen atom and n is 1 or 2.
Claim 2
Dependent Claim
106 words
In a recording material in which images are formed by the reaction of a substantially colorless color former with a color developer, the improvement which comprises said color developer comprising the reaction product of salicyclic acid and a styrene dimer or a metal salt thereof, wherein said reaction product is represented by the following general formula: ##STR6## wherein R 1 to R 6 each represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, R 5 and R 6 represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms or halogen atom and n is 1 or 2.
Claim 3
Dependent Claim
27 words
The recording material of claim 1, wherein said color developer is coated on a support in an amount of 0.1 g/m 2 to 3.0 g/m 2 .
Claim 4
Dependent Claim
25 words
The recording material of claim 1, wherein said salicylic acid is substituted with said dimer at at least one of the 3-position and the 5-position.
Claim 5
Dependent Claim
36 words
The recording material of claim 3, wherein said color developer additionally contains an oxide, hydroxide, carbonate, acetate or phosphate of a polyvalent metal salt selected from the group consisting of zinc, aluminium, barium, silicon and calcium.
Claim 6
Dependent Claim
17 words
The recording material of claim 3, wherein said color developer additionally contains talc, clay, or active clay.
Claim 7
Dependent Claim
23 words
The recording material of claim 3, wherein said color developer is coated on said support in a latex or water soluble polymer binder.
Claim 8
Dependent Claim
18 words
The recording material of claim 1, wherein said color developer is a metal salt of said reaction product.
Claim 9
Dependent Claim
19 words
The recording material of claim 7, wherein said metal forming said metal salt is a divalent or trivalent metal.
Claim 10
Dependent Claim
30 words
The recording material of claim 7, wherein said metal forming said metal salt is selected from the group consisting of zinc, aluminium, tin, barium, calcium, magnesium, nickel, cobalt and strontium.
Claim 11
Dependent Claim
17 words
The recording material of claim 7, wherein said metal forming said metal salt is zinc or aluminium.
Claim 12
Dependent Claim
14 words
The recording material of claim 7, wherein said salt is a metal complex salt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |